但在常温下使基体组织发生变化需要庞大的脉冲发生器组，成本造价高。

But in normal temperature this change needs huge current pulse generator which cost is expensive.

youdao

但在常温下使基体组织发生变化需要庞大的脉冲发生器组，成本造价高。

But in normal temperature this change needs huge current pulse generator which cost is expensive.

youdao